.controls {
  display: flex;
  flex-flow: row nowrap;
}

.control-btn {
  display: none;
  width: 44px;
  height: 30px;
  background-color: transparent;
  color: rgb(190, 190, 190);
  transition: background-color linear .2s;
  line-height: 30px;
  text-align: center;
  cursor: default;
}
.control-btn:hover {
  background-color: rgb(90, 90, 90);
}
.control-btn.danger:hover {
  background-color: rgb(215, 21, 38);
}
.control-btn.is-show {
  display: block;
}